What is the rest of his diet like? How often are you changing foods? I know that changing foods without giving a dog the chance to transition can cause some GI tract upset. Also intolerance to a specific ingredient could be giving Yoshi gas.
BTW my Toki really enjoys the freeze-dried Stella & Chewy's! She hasn't had any gas (thank god haha).
I'd stick with one food for a while to get every thing settled down. It's more difficult to figure out what exactly is going on with so many different foods factored in. |